How to Enable Power Saving Mode in Galaxy S4

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Other than Power Saving Apps, Samsung Galaxy S4 has a built in Power Saving mode and you can enable CPU Power Saving, Screen power saving, Turn off Haptic feedback. Power Saving Mode is enabled by doing as follows:

1. Open "Settings" app

2. Go to "My Device" tab

3. Enable "Power saving mode" and tap on it

4. On the opened menu, you have 3 options:

a. CPU Power Saving: Limit the maximum performance of the CPU

b. Screen power saving: Use low power level for screen

c. Turn off haptic feedback: Turning off haptic feedback can extend battery life

** if you tap "Learn about Power saving mode" you get familiar with some useful tips regarding the issue